Angular ng-click not working for Treemap

I am having trouble getting ng-click to work. 

Here is a dojo of what I would like to do. 

http://dojo.telerik.com/IFuRE/2

I don't really need to use buttons or templates in my case, I would like to be able to click anywhere on a tile and have that trigger a function with the dataitem that was clicked.

I did find this example here:

http://dojo.telerik.com/@SiliconSoul/uMORu

But this is not really the angular way to do this, I would like to use a function on my controller and have the scope come through etc.

Regards,

Ivan